The Silicone Hurricane hookah bowl designed for our Heat Management Systems, making them hard to knock off. The spiral design allows for easy mixing and even heating for the length of your sessions. The silicone's heating properties requires less charcoal, and heats the bowl up faster. Never worry about breaking your hookah bowl again, it will just bounce! That same rubbery aspect allows it to fit on most hookahs without the need for a grommet.